/* 样式的重置 */
body, html, h1, h2, h3, h4, h5, h6, ul, ol, li, dl, dt, dd, header, menu, section, p, input, td, th, ins {
    padding: 0;
    margin: 0;
  }
  
  ul, ol, li {
    list-style: none;
  }
  
  a {
    text-decoration: none;
    color: #666;
    margin-right: 10px;
  }
  
  a:hover {
    color: #666;
    text-decoration: underline;
  }
  
  i, em {
    font-style: normal;
  }
  
  input, textarea, button, select, a {
    outline: none;
    border: none;
  }
  
  table {
    border-collapse: collapse;
    border-spacing: 0;
  }
  
  img {
    border: none;
    vertical-align: middle;
  }
  .activeClass{
    background: blue;
  }